The Iskut volcanic field is a group of
volcanoes and
lava flows on and adjacent to the
Alaska–
British Columbia border in the
Boundary Ranges
The Boundary Ranges, also known in the singular and as the Alaska Boundary Range, are the largest and most northerly subrange of the Coast Mountains. They begin at the Nass River, near the southern end of the Alaska Panhandle in the Canadian p ...
of the
Coast Mountains
The Coast Mountains (french: La chaîne Côtière) are a major mountain range in the Pacific Coast Ranges of western North America, extending from southwestern Yukon through the Alaska Panhandle and virtually all of the Coast of British Columbia ...
. All the volcanoes in this
volcanic field are situated in British Columbia along the
Iskut and
Unuk rivers and their
tributaries, with lava flows having reached Alaska. The oldest volcanoes in the Iskut volcanic field are
Little Bear Mountain and
Hoodoo Mountain, which are 146,000 and 85,000 years old, respectively. Younger volcanic centres include
Second Canyon,
King Creek,
Tom MacKay Creek,
Snippaker Creek,
Iskut Canyon,
Cone Glacier,
Cinder Mountain and
Lava Fork
Lava Fork is a creek in northwestern British Columbia, Canada and of the Alaska Panhandle, United States. It lies west of the Unuk River and northwest of Stewart. It flows south from the Lava Lakes across the British Columbia-Alaska border into ...
, all of which formed in the last 70,000 years. All of the volcanoes are
mafic in composition except for Hoodoo Mountain which consists of
peralkaline rocks.
The latest volcanic eruption took place from the Lava Fork volcano in 1800, although an uncertain 1904 eruption is also attributed to this volcano.
The name Iskut-Unuk River Cones is a nearly synonymous term for this volcanic field but it omits Hoodoo Mountain and Little Bear Mountain, the oldest volcanoes comprising the Iskut volcanic field.
The name for this area in the Tlingit language is Séxkhulé, referring to the time of Aan Galakhú (the World Flood) when people took refuge here from the rising flood waters.
See also
*
List of Northern Cordilleran volcanoes
*
List of volcanoes in Canada
List of volcanoes in Canada is an incomplete list of volcanoes found in Mainland Canada, in the Canadian islands and in Canadian waters. All but one province, Prince Edward Island, have at least one volcano.
Alberta
British Columbia
Ne ...
*
Volcanism of Western Canada
Volcanism of Western Canada has produced lava flows, lava plateaus, lava domes, cinder cones, stratovolcanoes, shield volcanoes, greenstone belts, submarine volcanoes, calderas, diatremes and maars, along with examples of more less common volcanic ...
References
External links
Catalogue of Canadian volcanoes: Iskut RiverAlaska Volcano Observatory: Iskut-Unuk River Cones
Volcanic fields of Canada
Boundary Ranges
Stikine Country
Northern Cordilleran Volcanic Province
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